MATERIALS

Epoxy Grout

High-strength resin grout for crack injection, anchoring + precision base-plate grouting

Also calledepoxy groutingstructural epoxycrack injection epoxymachine base grout
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CODES
Definition

Epoxy grout is a two-component (resin + hardener) thermosetting grout, usually filler-loaded, that cures to a high-strength, low-shrinkage, chemically resistant solid with excellent adhesion to concrete and steel. It develops far higher compressive, tensile and bond strength than cementitious grout and is essentially impermeable, but is more expensive, temperature-sensitive and not for very large volumes (exotherm) — so it is used where performance, not volume, is the requirement.

Typical uses are pressure crack-injection to structurally re-bond cracked concrete, anchoring rebar/bolts/dowels into drilled holes (post-installed anchors), precision grouting under machine base-plates and structural steel columns, and bonding of new to old concrete. It supports concrete-repair work governed by IS 456 durability/repair intent and IS 13935 (repair and seismic strengthening), with the proprietary system's data sheet dictating mixing ratio, pot life, gap/temperature limits and cure — all of which strongly affect the result and form the basis of acceptance.

Where used
  • Structural crack injection + re-bonding
  • Post-installed anchor + rebar/dowel fixing
  • Precision grouting under machine + column base-plates
  • Bonding new concrete/steel to existing concrete
  • Repair + strengthening of distressed RCC (IS 13935)
Acceptance / threshold
Per the proprietary system data sheet within an IS 456 / IS 13935 repair specification — correct mix ratio, pot life, substrate prep, temperature + gap limits; acceptance by injection records and, where relevant, anchor pull-out testing.
Frequently asked
What is epoxy grout used for?
Structural crack injection, anchoring bolts/rebar/dowels, precision grouting under machine and column base-plates, and bonding new concrete to old — wherever very high strength, bond and impermeability are needed in small volumes.
What is the difference between epoxy grout and cement grout?
Epoxy grout gives much higher strength, bond and chemical/impermeability performance with low shrinkage, but is costlier, temperature-sensitive and unsuitable for large volumes. Cement grout suits large-volume, lower-stress filling.
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